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authorJon Hunter <jon-hunter@ti.com>2012-09-24 03:28:30 +0400
committerPaul Walmsley <paul@pwsan.com>2012-09-24 03:28:30 +0400
commit6a9bce2766ef8bb7025c011653914a94a2a9ef32 (patch)
tree1e297ac9e59f735d29a57aa56ad6914d3d16fe22 /arch/arm/mach-omap2/pmu.c
parentefc7f49c87b7b806fbd840eb0ece5a3c8d2d79ef (diff)
downloadlinux-6a9bce2766ef8bb7025c011653914a94a2a9ef32.tar.xz
ARM: OMAP2+: PMU: Add runtime PM support
The original implementation of this patch was done by Ming Lei for PMU on OMAP4 [1]. Since then the PM runtime calls have been moved into the ARM PMU code and this greatly simplifies the changes. The another differnce since the original version, is that it is no longer necessary to call pm_runtime_get/put during the PMU initialisation was we are no longer accessing the hardware at this stage. By adding runtime PM support, we can ensure that the appropriate power and clock domains are kept on while PMU is being used. [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2011-November/074153.html Cc: Ming Lei <ming.lei@canonical.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Benoit Cousson <b-cousson@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Kevin Hilman <khilman@ti.com> Signed-off-by: Jon Hunter <jon-hunter@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2/pmu.c')
-rw-r--r--arch/arm/mach-omap2/pmu.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/pmu.c b/arch/arm/mach-omap2/pmu.c
index af35c77c4ab4..05600374c240 100644
--- a/arch/arm/mach-omap2/pmu.c
+++ b/arch/arm/mach-omap2/pmu.c
@@ -11,6 +11,7 @@
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
+#include <linux/pm_runtime.h>
#include <asm/pmu.h>
@@ -53,7 +54,12 @@ static int __init omap2_init_pmu(unsigned oh_num, char *oh_names[])
WARN(IS_ERR(omap_pmu_dev), "Can't build omap_device for %s.\n",
dev_name);
- return IS_ERR(omap_pmu_dev) ? PTR_ERR(omap_pmu_dev) : 0;
+ if (IS_ERR(omap_pmu_dev))
+ return PTR_ERR(omap_pmu_dev);
+
+ pm_runtime_enable(&omap_pmu_dev->dev);
+
+ return 0;
}
static int __init omap_init_pmu(void)